(19)

(11)

EP 0 842 113 A1

(12)

(43) Date of publication: 20.05.1998 Bulletin 1998/21 (21) Application number: 96925906.0 (22) Date of filing: 01.08.1996

(51) International Patent Classification (IPC):  G01N 27/ 327( . ) A61L 27/ 02( . ) A61L 27/ 32( . ) C01B 33/ 02( . ) A61L 27/ 00( . ) A61L 27/ 30( . ) A61L 27/ 56( . ) A61F 2/ 00( . ) (86) International application number: PCT/GB1996/001863 (87) International publication number: WO 1997/006101 (20.02.1997 Gazette 1997/09)

(84) Designated Contracting States: CH DE FR GB IT LI NL SE (30) Priority: 03.08.1995 GB 19950015956 28.11.1995 GB 19950024242 31.05.1996 GB 19960011437 (71) Applicant: THE SECRETARY OF STATE FOR DEFENCE Farnborough, Hampshire GU14 6TD (GB)	(72) Inventor: CANHAM, Trevor, Leigh Defence Research Agency Malvern Worcestershire WR14 3PS (GB) (74) Representative: Skelton, Stephen Richard, et al  D/IPR (DERA) Formalities Poplar 2a MOD (PE) Abbey Wood #19 P.O. Box 702 Bristol BS12 7DU Bristol BS12 7DU (GB)